.site-header{
    height: 70px;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    /*  */
}
.site-header .header-container{
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 1200px;
    height: 70px;
    margin: 0 auto;
    padding: 0 20px;
    /* background-color: #454545; */
}
.logo img{
    width: 200px;
    height: 40px;
}
.site-header .header-nav ul{
    display: flex;
    gap: 20px;
}
.site-header .header-nav ul a{
    color: #333;
    font-weight: bold;
    padding: 8px 12px;
    border-radius: 4px;
}
.site-header .header-nav ul a:hover{
    background: #f0f0f0;
}
/* actions */
.header-actions{
    display: flex;
    align-items: center;
    gap: 16px;
}
.site-header .search input{
    padding: 4px 12px;
    background-color: #f5f5f5;
    border-radius: 20px;
    text-indent: 8px;
    font-size: 14px;
    border: 1px solid #ddd;
    outline: none;
}
/* 登录注册 */
.site-header .user-porfile{
    display: flex;
    align-items: center;
    gap: 8px;
}
.site-header .user-porfile .login-link{
    padding: 5px 5px;
    border-radius: 4px;
    font-weight: bold;
    border: 1px solid transparent;
    color: #333;
}
.site-header .user-porfile .login-link:hover{
    background-color: #e9ecef;
}
.site-header .user-porfile .register-link{
    padding: 5px 5px;
    border-radius: 4px;
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
}
.site-header .user-porfile .register-link:hover{
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
}